This new edition provides technical updates that have reached consensus within API’s Subcommittee on Tubular Goods and gives industry consistent practices in these respective areas of the standard. These updates are reflective of API’s standards program mission to provide a forum for development of consensus-based industry standards, and technical cooperation to improve the industry’s safety performance and competitiveness.
Key Changes Include:
Updated and expanded requirements for mill jointers;
Updated requirements for pipe end squareness;
Updated requirements for hardness testing on PSL 2 pipe for sour service and PSL 2 pipe for offshore service;
New annex for strain-based design requirements
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这个新版本提供了技术更新，已在API的管产品小组委员会达成共识，并在标准的这些领域内提供业界一致的做法。这些更新反映了API的标准方案使命，为建立以协商一致为基础的行业标准提供了论坛，并为提高该行业的安全性能和竞争力而进行技术合作。
主要更改包括：
更新和扩大机接口要求；
更新后的管端垂直度要求；
酸性服务用PSL 2管和PSL 2管对离岸服务的硬度测试的最新要求；
基于应变设计要求的新附件
